Now a day the mostly air condition are use the air for reducing the temperature at the condenser unit. Moreover many dusts are adhering in area of fin coil. From this reason the heart reduction efficiency is decreased and increasing the energy consumption. Thus the aim of this research is to design the finned-tube condenser unit cleaner machine for increasing the heart reduction efficiency. From the results of experiment it found that the finned-tube condenser cleaner machine is desirable when comparing with the performance before used. By the original performance the refrigeration effect coefficient of performance (C.O.P) and energy efficiency ratio (EER) is 34179 Btu/hr 2.62 and 8.9 Btu/hr.Watt. On the other hand the refrigeration effect (C.O.P) and (EER) is 39766 Btu/hr 3.12 and 10.7 BtuIhr.Watt respectively when the condenser unit cleaner machine is used. Based on this condition the value of the refrigeration effect and (EER) are increase to 16.35% and 19.19% respectively. Thus the heart reduction in condensing unit can be aided the performance and prolong the life time of air condition by depending on the cleaning of condensing unit.

This research project aim is to discover information about the way constmcts the cogitative patterns of Business Management faculty in coherent of the business firms and for who interested in it. Our investigation by the generic questionnaire to survey the participants to probe the relationships among the data from the eager work forces of the students in Business Management faculty at Rajamangala University of Technology Phra Nakhon Dhurakijpundit University and persons they want to improve or to certify in higher certificate by surveyed the banks employees and the government services in totally 117 persons Both of qualification and survey researches were used. The researchers need as much information as possible for the complete testing tools with the 6 curriculums to construct the surveying form for 3 target groups. We used descriptive statistic to show the percentage data results. As described the percentage data from the participant data for evaluated and explained the behaviors of requirement to gain knowledge in the field of studies that they needs by usage the average and percentage of statistical analysis The studied result denotes the continuous studying fields of requirement on the curriculums at Business Management faculty by ordered popularization and higher requirement of 3 study-fields: Computer Information System Business English and Management. Mostly they want to take the periods of itudies during 1-12 months or the 1 year courses. Thus the short courses have to introduce for arrangement and preparation for them to get their certification and punctually respond to the consumers.

This research is to study the recycle process of hard materials high hardness type and cemented carbide produced by press forming and sintering process included cemented carbide mixed with tungsten carbide cobalt silicon titanium and others. The research aims to recovery tungsten to use it again. It starts in cleaning and ball milling materials for resizing from length 12-25 mm. width 10-15 mm and thickness 2.5-8.0 mm. then disintegrated with the electric-chemical process filtering metal powder cleaning and drying. The result of dissolved materials with electricchemical process in 85% condensed HCl 6-24 volts and 3-10 amperes. The solution heats up 180 degree Celsius is found that material will be 550 11m of W03 the same as usage of Phosphoric Solution. The result of the study in dissolved materials by using the conductor of electricity is found that usage of cobalt is the best to disintegrate tungsten carbide better than tungsten carbide and stainless steel 10-15%. The result of this research is found that the best practice of tungsten carbide recovery is dissolved materials with electric-chemical process in not over 7N condensed HCl 6.00 volts and 3.00 amperes. The metal powder will be almost 100% pure tungsten carbide and particle sized distribution is 34-360 11m. After ball milling for 24 hours particle sized distribution is less than 60 11m compared with the imported metal powder. It is concluded that the recycle of cemented carbide into tungsten carbide powder qualified for sintering work and produced to the durable hard materials. It ensures that this research is useful for the related industry and the approach for production of tungsten carbide which was instead of the imported metal powder.

โครงการนี้เป็นการพัฒนาระบบควบคุมการทำงานของเครื่องปรับอากาศ เพื่อควบคุมพลังงานไฟฟ้า ที่จ่ายให้กับเครื่องปรับอากาศขนาดเล็ก ที่ใช้งานทั่วๆไป โดยใช้วิธีการควบคุมอุปกรณ์กำลัง โดยการปรับความกว้างของสัญญาณควบคุมที่ผสมกับสัญญาณพาหะ (Pulse Width Modulation: PWM) วงจรควบคุมใช้ตัวควบคุมขนาดเล็ก (Micro Controller)

รายงานการวิจัยฉบับนี้จัดทำขึ้นเพื่อประกอบการดำเนินงานตามโครงการวิจัยพัฒนาและเผยแพร่ ผลิตภัณฑ์เครื่องตกแต่งบ้านจากกระดาษสาโดยใช้เทคนิคการสร้างลวดลายของมหาวิทยาลัย เทคโนโลยีราชมงคลพระนคร วิทยาเขตโชติเวช งบประมาณประจำปี 2548 โดยมีวัตถุประสงค์ เพื่อตกแต่งกระดาษสาด้วยเทคนิคการสร้างลวดลายแบบต่าง ๆ ที่แปลกใหม่เพื่อเพิ่มความสนใจ ของกระดาษสาทั่วไป และนำมาจัดทำเป็นผลิตภัณฑ์เครื่องตกแต่งบ้านเพื่อเพิ่มประโยชน์ใช้สอย มากยิ่งขึ้น